[hpsdr] ANAN-100D Angelia_test_v3.9 code

[Joe Martin K5SO]

Brian, 

I have confirmed that multiple filter are not being inadvertently put in parallel on Tx in the ANAN-100D using Angelia_test_v3.9.  

I ripped open the 100D, fabricated a 7-LED display module, and connected it to the relays of the LPFs, and verified directly using Angelia_test_v3.9 that we do not have two LPFs inadvertently switched in parallel on any band selection.  The filter switching is performing exactly as it is designed to do.  I don’t have an explanation for you for your observed “bump” in the gain settings you mention but I take it that the slight deviation from your previous observations is not a serious problem for you.  

By the way, the components in the Tx filters of the ANAN-100D appear to me to be identical to those in the Alex LPF board.  Thus those filters are low pass filters, not band pass filters, regardless of the fact that the control lines for the relays there are labeled “BPFn” on the PA schematic.  They probably should’ve been labeled “LPFn” instead, but that’s nit and does not affect operation of course. 

Now I have to see if I can put this thing back together, hihi!  

73,  Joe K5SO

On Feb 9, 2014, at 1:42 PM, Brian Lloyd wrote:

> On Sun, Feb 9, 2014 at 1:37 PM, Joe Martin K5SO <k5so at valornet.com> wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Thanks, Bruce.  Great to hear it!
> 
> When doing the calibration one thing I noticed that surprised me is that gain is not consistent. Used to be on my ANAN-100D and ANAN-10 that gain was steadily lower going from 160m to 6m. I now have some bumps where not expected, e.g. the PA gain is higher for 15m than for 17m.
> 
> Hmm, the relay drivers for the PA BPF are a pair of TPIC6B595 shift registers. That means that it would be possible to shift in two bits and select two of the BPF in parallel. That might have a significant effect on the passband ripple. Can you confirm that only one bit gets loaded into the shift register?
> 
> -- 
> Brian Lloyd, WB6RQN/J79BPL      
> 706 Flightline Drive
> Spring Branch, TX 78070
> brian at lloyd.com
> +1.916.877.5067

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